Change exponential backoff timeouts + add constants

[enoch85]

Eliminates hardcoded timeout, retry, cache TTL, and time conversion values across 17 files, replacing them with centralized constants from Network.Defaults and TimeInterval.

Changes

Added constants to Network.Defaults:

• SECONDS_PER_HOUR = 3600
• RETRY_CUTOFF_TIME_HOUR = 23, RETRY_CUTOFF_TIME_MINUTE = 50
• CACHE_DEFAULT_TTL_SECONDS = 3600

Replaced hardcoded values:

• HTTP timeouts: 60 → Network.Defaults.HTTP_TIMEOUT in comed.py, api_client.py, session_manager.py
• Retry configuration: max_retries=3 → Network.Defaults.RETRY_COUNT in error_handler.py
• Retry intervals: 1800 → Network.Defaults.STANDARD_UPDATE_INTERVAL_MINUTES * SECONDS_PER_MINUTE in 4 API clients
• Cutoff times: time(23, 50) → time(RETRY_CUTOFF_TIME_HOUR, RETRY_CUTOFF_TIME_MINUTE) in 3 API clients
• Cache TTLs: 6 * 60 * 60 → Network.Defaults.CACHE_TTL in data_fetch.py
• Time intervals: 15 → TimeInterval.get_interval_minutes() in 3 parsers/coordinators
• Time conversions: 3600, * 60 → SECONDS_PER_HOUR, SECONDS_PER_MINUTE in 5 utility modules

Example:

# Before
async with asyncio.timeout(60):
    await session.get(url)
cache_ttl = 6 * 60 * 60
if now.time() > time(23, 50):
    return

# After  
async with asyncio.timeout(Network.Defaults.HTTP_TIMEOUT):
    await session.get(url)
cache_ttl = Network.Defaults.CACHE_TTL
if now.time() > time(Network.Defaults.RETRY_CUTOFF_TIME_HOUR, Network.Defaults.RETRY_CUTOFF_TIME_MINUTE):
    return

[Copilot]

@enoch85 I've opened a new pull request, #52, to work on those changes. Once the pull request is ready, I'll request review from you.

[enoch85]

@copilot Please look through the changed constants here in this PR. Then look for more occurances were we forgot to change to the use of constants instead of hard coded values. Be thorough, think deep, inspect every line of the code base. Read all the code base in sections by 400 lines each. Analyze if we need constant replacements in more places.

Use your built in tools to grep, sed, and whatever you need to truly find everything.

Create a PR with your changes, if any.

[Copilot]

@enoch85 I've opened a new pull request, #53, to work on those changes. Once the pull request is ready, I'll request review from you.